Symmetron Family Symmetron is a Greek word meaning harmony in dimensions. Following this rule, the two implant systems of this family are in general cylindrical. SYMMETRON TL and SYMMETRON BL These two systems share the same surgical kit with the exception of implant driver. FEATURES TL Lengths & Diameters Lengths & Diameters Drilling Sequence Drilling Sequence FEATURES BL Lengths & Diameters Lengths & Diameters Drilling Sequence Drilling Sequence